Milling-machine attachment



Jan. 3, 1928.

' F. JACK MILLING MACHINE ATTACHMENT Filed June 18. 1926 2 Sheets-Sheet l @Ctozmq Jan. 3, 1928.

1,654,882 F. JACK MILLING MACHINE ATTACHMENT Filed Jun'e 1s. 1926 2 sheets-sheer' 2 aurez mu Patented Jan. 3, 192.8.

UNITED, D STATES rINDLAY JACK, or rawrncxnr, RHODE ISLAND, AssiGNoa To BROWN ,e sHAnrn MFG. ooivirANY, or PROVIDENCE, RHODE ISLAND.y f

MILLING-MACHINE ATTACHMENT.

, Application filed June 18,

This invention relates to certainciiew and useful improvements in milling machine attachments and pertains more particularly to a device which is attachable to the movable table lfor the purpose of quickly returning the table to its initial or starting.v point after the work on the table `has passed beneath the cutting tool. v y

The primary object oic the inventionis to provide a device of this typel which is at- Vtacliable to either end of the table to thereby enable the device to be applied inaccoi'drance with the space permitted, since owing to the close quarters assigned to small milling machines, it is necessary that the device of this character' be applied according to the availablespace. Y

A further object of the invention is to provide a device of this character which` is of simple and compact construction, positive and quick in its movement, and composedr ot a minimum of parts.

Vln the drawings I Fi 1 is an end elevation ot the invention applied to a milling ,inachine, the latter shownin fragment; y

Fig. 2 is a top plan view, and.

Fig. 3 is a section on line 3-3 of Fig. '2.

In proceeding in accordance with the present invention, the attachment is formed of a substantially U-shaped rframe 1, the arms 2- of which are ormedat tlieirouter or Vtree ends with circular heads 3 and 1. Hooks or lingers 5 project upwardly from the frame 1 and hook over either end of the movable hed or carriage C of the milling machine. A central boss 6 is carried by the trame 1 and is located between the hooks 5, and re` ceives therein a bolt 7 having a nut 8 'there on, the lower end of the bolt being turned at an angle to iorni a ringer that engages the under 'face or the bed C. From the foregoing will be seen that the frame can be clamped onto either end oi. the table both easily and quickly.

The shaft 10 extends through the heads 3 and l and through collars 11 and 12. The collar 11 is rigidly secured to a drum or vspool 13 by means of a scr-ew 14, the shaft however passing loosely through the collar 11. The collar 12 is keyed at 15 to the shaft and is hereby held on' a reduced part 16 ot' the shaft and against shoulder 17 resultant from the reduced part. A journal ring 18 is secured by means of a screw 19 to the 1926. Serial No. 116,832.

sleeve or drum 13.- A coil tensioning spring 2O which is partly broken awayrat4 its center in Fig. 3, is employed to tensionH the ydrum 13, and has one end 21, secured in collar 11, while .its opposite end 22 is secured in the collar 12. The head 3, .which is rigidly carried by the Jiii-ame: 1',

at 28 to the shaft 10, and. is held on the latter by a nutQG- The disk 25, is provided with peripheral opening 9, to'receive al pin or the like whereby to enable the disk 25, to r.be

turned so as to adjust the tension of the spring 20.

A chain 30 is secured to the drum atone end and at its opposite end is 'suitably secured to the stationary bed B of the milling machine, for enample'by means of a screw 31; a bolt or screw similar to the Screw 31 is employed'to secure the chain tothe drum.

The invention is employed in connection with a milling machine of the type shown I l 1,654,882 PATENT. OFFICE. y

in the patent to Stedman, No. 893,205 dated i July 14, 1908. The movable bed or carriage C is operated by power on its working stroke and upon completion of the latter, the power is disengaged from the hed C. During working stroke of the bed C, power is stored up in the drum 18, and upon release of the bed from the driving power of ythe machine, the drum, under the influence of the wound up spring vill wind the` chain thereabout thereby to move the carriage to` initial position ready 'to be again Agiven its working stroke by the driving power of the machine.

Having thus described myY invention what I claim as new and desire to secure by Let-A ters Patent is- 1. An attachment for milling machines of the type wherein the carriage is operated by drivingmeans on its working stroke and upon `completion of such stroke the driving means is disengaged from the carriage including a frame, means to secure the frame to the carriage, a vspring tensioned drum on the frame, means to regulate the tension of the spring, and a chain connected to the rdrum and to the bed of the machine to tension the spring uponworking stroke of the carriage and upon disengagement of the vdriving means :trom the carriage to autothe type wherein the carriage is operated by.

driving means on its working stroke and upon completion of such stroke the driving means is disengaged -from the carriage including a power device, means connected to thedevice and to the bed of the machine for actuating the device to storeup powerY therein on the working stroke of the carriage and upon disengagement of the driving means from the carriage to automatically restore the carriage to initial position.

3. An attachment for milling machines of the type wherein the carriage is operated by driving means on its working stroke and upon completion of such stroke the driving means is disengaged from the carriage including a rotatable power device, means to tension the device, means to attach the device to the carriage of a milling machine,

and flexible means connected to the device` and to the bed of the machine whereby upon movementoic the carriage on its working stroke the flexible means will actuat'e the device to store-up power therein, and upon disengagement of the driving means from the carriage will wind the flexible means on Vthe device to thereby automatically move the carriage to initial position.

el. An attachment for milling machines of the type wherein the carriage is operated by driving means on its working stroke and upon completion of suoli stroke thev driving means is disengaged Vfrom the carriage `including power means, means to attach said means to eithereiid oit a milling machine" carriage,aiid means whereby'upon the working stroke of the carriage power will be stored up in the power means and upon disengagement of the driving means from the carriage will automatically restore the carriage to initial position. Y

An attachment ior milling machines of the type wherein the carriage slides on a bed and is operated by driving means Von its working stroke and upon completion of such stroke the driving means' is disengaged from.

the carriage including actuating means, means to attach said actuating means to one of the lirst two named elements of the machine, and means connected to the actuating means and to the other of said two irst named elements wherebyto energize the ac` tuating means upon the working stroke of the carriage, and upon disengagement 01' the driving means from the carriage to automatically restore the carriage to initial position.

In testimony whereof I have signed my name to this specilication.

AFIN'DLAY JACK. 

